Question

What is the cause of acid rain?

• A. Metal oxides present in the atmosphere.
• B. Acids present in the clouds.
• C. Non-Metal oxides in the atmosphere.
• D. Pollutants present in soil and water.

Answer 1

The correct option is C Non-Metal oxides in the atmosphere.

Oxides in the atmosphere reacts with rain water to form acids. These oxides are the pollutants that are released to atmosphere. So main cause of acid rain are the pollutants in the atmosphere that make the rainfall acidic.
For example, ${\text{SO}}_2$ and ${\text{NO}}_2$ dissolve in moisture to form acids leading to the formation of acidic rain.